The relay finals where always set to be eventful after the dramatic heats.

The men's final was pretty much sown up by the Jamaican team sure enough they performed and took the Olympic 4x100m crown along with destroying the world record set by the USA team back in the Olympic games in Barcelona '92.

Jamaica ran 37.10 seconds, breaking the previous mark of 37.40 in a new world record.

Trinidad and Tobago took the silver in 38.06 seconds and Japan won the bronze in 38.15.

The women's 4x100m relay was as dramatic as the heats. Jamaica were expected to land a sixth track and field gold

Team GB and Jamaica didn't manage to get the baton round the track and both did not finish the race, and final fell into the hands of Russia who won the Olympic gold medal in a time of 42.31, the slowest winning time in 32 years!

Belgium took silver and Nigeria took bronze.